Question: Who fathered the leader of the first expedition to reach the mentioned continent by sailing west across the ocean bordering eastern Russia?
Context: Document 1: Chronology of European exploration of Asia: The Portuguese Vasco da Gama, accompanied by Nicolau Coelho and Bartolomeu Dias, is the first European to reach India by an all - sea route from Europe.
Document 2: Vasco da Gama: Vasco da Gama's father was Estêvão da Gama, who had served in the 1460s as a knight of the household of Infante Ferdinand, Duke of Viseu. He rose in the ranks of the military Order of Santiago. Estêvão da Gama was appointed "alcaide-mór" (civil governor) of Sines in the 1460s, a post he held until 1478; after that he continued as a receiver of taxes and holder of the Order's commendas in the region.
Document 3: Russian Soviet Federative Socialist Republic: The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR; Russian: Российская Советская Федеративная Социалистическая Республика, tr. Rossiyskaya Sovetskaya Federativnaya Sotsialisticheskaya Respublika  listen (help·info)) commonly referred to as Soviet Russia or simply as Russia, was a sovereign state in 1917–22, the largest, most populous, and most economically developed republic of the Soviet Union in 1922–91 and a sovereign part of the Soviet Union with its own legislation in 1990–91. The Republic comprised sixteen autonomous republics, five autonomous oblasts, ten autonomous okrugs, six krais, and forty oblasts. Russians formed the largest ethnic group. To the west it bordered Finland, Norway and Poland; and to the south, China, Mongolia and North Korea whilst bordering the Arctic Ocean to the north, the Pacific Ocean to the east and the Black sea and Caspian Sea to the south. Within the USSR, it bordered the Baltic republics (Lithuania, Latvia and Estonia), the Byelorussian SSR and the Ukrainian SSR to the west. To the south it bordered the Georgian, Azerbaijan and Kazakh SSRs.
Document 4: Girl: Gender influences the pattern of child labor. Girls tend to be asked by their families to perform more domestic work in their parental home than boys are, and often at younger ages than boys. Employment as a paid domestic worker is the most common form of child labor for girls. In some places, such as East and Southeast Asia, parents often see work as a domestic servant as a good preparation for marriage. Domestic service, however, is among the least regulated of all professions, and exposes workers to serious risks, such as violence, exploitation and abuse by the employers, because the workers are often isolated from the outside world. Child labor has a very negative effect on education. Girls either stop their education, or, when they continue it, they are often subjected to a double burden, or a triple burden of work outside the home, housework in the parental home, and schoolwork. This situation is common in places such as parts of Asia and Latin America.
Answer: Estêvão da Gama
Reasoning steps: What continent is mentioned? Answer: Asia
Which ocean is along eastern Russia? Answer: the Pacific Ocean
who led the first expedition to reach Asia by sailing west across #2 Answer: Vasco da Gama
Who fathered Vasco da Gama ? Answer: Estêvão da Gama